The Verizon Wireless Dynamic Mobile IP Key Update procedure is a mechanism for distributing and updating Mobile IP (MIP) cryptographic keys in cdma2000(R) networks (including High Rate Packet Data which is often referred to as 1xEV-DO). The Dynamic Mobile IP Key Update (DMU) procedure occurs between the MIP Mobile Node (MN) and RADIUS AAA Server via a CDMA2000(R) Packet Data Serving Node (PDSN) that is acting as a Mobile IP Foreign Agent (FA).